UA 367 then DL 670 at San Francisco
Washington → San Francisco → New York JFK
Timetable, San Francisco time
01:29UA 367 from Washington at the gatealso LH 7530, VA 8388, NZ 9181
22:25DL 670 to New York JFK leaves the gatealso AM 4305, SV 4360, LY 4444, VS 4848, LA 6189, KQ 7055
20 h 56 apart on the timetable
DL 670 leaves 20 h 56 after UA 367 arrives on the timetable: more than half a day, so not a connection we count.